condition mean min max ZT0-3 50.021 45.35445 54.68755 ZT4-7 22.32745 22.32745 22.32745 ZT8-11 36.866299999999995 36.866299999999995 36.866299999999995 ZT12-15 0 0 0 ZT16-19 51.89945 51.89945 51.89945 ZT20-23 57.163700000000006 57.163700000000006 57.163700000000006